List of Hot 100 number-one singles of 2019 (Japan)
# List of Hot 100 number-one singles of 2019 (Japan)

The following is a list of number-one singles on the Billboard Japan Hot 100 chart in 2019.

## Chart history

| Issue date | Song | Artist(s) |
| - | - | - |
| January 7 | "Lemon" | Kenshi Yonezu |
| January 14 | "Lemon" | Kenshi Yonezu |
| January 21 | "Lemon" | Kenshi Yonezu |
| January 28 | "Lemon" | Kenshi Yonezu |
| February 4 | "Lemon" | Kenshi Yonezu |
| February 11 | "Homechigirist" | Johnny's West |
| February 18 | "Kimi o Daisuki da" | Kis-My-Ft2 |
| February 25 | "Kaze o Matsu" | STU48 |
| March 4 | "Tokonoma Seiza Musume" | NMB48 |
| March 11 | "Kuroi Hitsuji" | Keyakizaka46 |
| March 18 | "Crystal" | Kanjani Eight |
| March 25 | "Jiwaru Days" | AKB48 |
| April 1 | "Uchōten Shooter" | Matsuri Nine |
| April 8 | "Kyun" | Hinatazaka46 |
| April 15 | "Kimi o Matteru" | King & Prince |
| April 22 | "Ishi" | HKT48 |
| April 29 | "Otona Survivor" | Last Idol |
| May 6 | "Ame Nochi Hare" | Johnny's West |
| May 13 | "Marigold" | Aimyon |
| May 20 | "Dark Knight" | One n' Only |
| May 27 | "Rain" | Kazuya Kamenashi |
| June 3 | "Lucky-Unlucky" | Hey! Say! JUMP |
| June 10 | "Sing Out!" | Nogizaka46 |
| June 17 | "Spirits of the Sea" | Kenshi Yonezu |
| June 24 | "Top Gun" | NEWS |
| July 1 | "Change" | Tomohisa Yamashita |
| July 8 | "Buenos Aires" | Iz*One |
| July 15 | "Lights" | BTS |
| July 22 | "Hands Up" | Kis-My-Ft2 |
| July 29 | "Do Re Mi Sol La Si Do" | Hinatazaka46 |
| August 5 | "Breakthrough" | Twice |
| August 12 | "Daisuki na Hito" | STU48 |
| August 19 | "Scarlet" | Sandaime J Soul Brothers featuring Afrojack |
| August 26 | "Bokō o Kaere!" | NMB48 |
| September 2 | "Fanfare!" | Hey! Say! JUMP |
| September 9 | "Koi-Wazurai" | King & Prince |
| September 16 | "Yoake Made Tsuyogaranakutemoii" | Nogizaka46 |
| September 23 | "Uma to Shika" | Kenshi Yonezu |
| September 30 | "Sustainable" | AKB48 |
| October 7 | "Vampire" | Iz*One |
| October 14 | "Konna ni Suki ni Natchatte Ii no?" | Hinatazaka46 |
| October 21 | "Big Shot!!" | Johnny's West |
| October 28 | "Pretender" | Official Hige Dandism |
| November 4 | "Kirin no Ko" | Sexy Zone |
| November 11 | "Zurui yo Zurui ne" | =Love |
| November 18 | "Hatsukoi Shijō Shugi" | NMB48 |
| November 25 | "Edge of Days" | Kis-My-Ft2 |
| December 2 | "Pretender" | Official Hige Dandism |
| December 9 | "Tomo yo" | Kanjani Eight |
| December 16 | "Hikari no Kehai" | KinKi Kids |
| December 23 | "Pretender" | Official Hige Dandism |
| December 30 | "Pretender" | Official Hige Dandism |
